[d23]

And as Buffet himself has said: as Berkshire grows in size they will have a harder time beating the market simply because they are becoming a bigger part of it.

[throw0101a]

Buffett hasn't beaten the S&P 500 for a while now:

* https://www.fool.com/investing/2019/12/22/5-reasons-warren-b...

He had a good run though. See "Buffett's Alpha":

* https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3197185

[d23]

The second point in your linked article is the exact point I / he was making.